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Klaviyo vs Postscript: Which Is Better for SMS Marketing?

March 19, 2025

In the world of digital marketing, customer engagement through SMS is increasingly becoming a crucial part of an omnichannel strategy. Two platforms that excel in this space are Klaviyo and Postscript. Both offer powerful features to help businesses grow, but they cater to slightly different needs and audiences, particularly when it comes to SMS marketing.

In this article, we’ll explore the key differences and similarities between Klaviyo and Postscript—focusing specifically on SMS marketing. Whether you're looking for a comprehensive marketing tool or a specialized SMS service, understanding the nuances of these two platforms will help you make an informed decision.

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Klaviyo: A Comprehensive Marketing Automation Platform

Klaviyo is known for its robust marketing automation and is particularly popular among e-commerce businesses. While it started primarily as an email marketing tool, it has since expanded to include SMS marketing, making it a versatile platform for businesses looking for both email and SMS solutions.

Key Features of Klaviyo for SMS Marketing

  1. Unified Email & SMS CampaignsOne of the major benefits of using Klaviyo is its ability to manage both email and SMS campaigns from a single platform. This allows you to maintain consistency across channels and target customers with a more unified experience. Klaviyo's seamless integration of both communication types helps streamline your marketing efforts.
  2. Advanced AutomationKlaviyo is widely praised for its advanced automation capabilities. With SMS, you can set up personalized messages triggered by customer actions, such as cart abandonment, sign-ups, or recent purchases. This enables you to send timely, relevant messages that have a higher chance of converting.
  3. In-Depth SegmentationKlaviyo’s segmentation capabilities allow you to tailor your SMS campaigns based on customer behavior and purchase history. Whether you want to target customers who haven't made a purchase in a while or those who have abandoned their carts, segmentation ensures you send the right message to the right person at the right time.
  4. Analytics and ReportingKlaviyo offers detailed analytics for both email and SMS campaigns. You can track delivery rates, open rates, click-through rates, and conversions for your SMS campaigns, making it easy to measure performance and optimize your strategy.
  5. SMS List BuildingKlaviyo helps businesses grow their SMS subscriber lists by providing easy-to-implement signup forms for your website. You can incentivize visitors with discounts in exchange for signing up for your SMS campaigns, making list-building a breeze.
  6. SMS and Email IntegrationOne of the standout features of Klaviyo is its ability to synchronize SMS and email efforts. You can create workflows that trigger both types of messages, such as sending a cart abandonment email followed by an SMS reminder, ensuring you have multiple touchpoints with your customers.

Pricing: Klaviyo’s pricing for SMS is based on the number of SMS messages sent. There is a free plan available for up to 250 contacts, but to access SMS features, you will need a paid plan.

Link: For more details, visit Klaviyo’s homepage here.

Postscript: The SMS Marketing Specialist

While Klaviyo is an all-in-one marketing solution, Postscript is a platform that focuses exclusively on SMS marketing. Designed specifically for e-commerce, Postscript integrates seamlessly with platforms like Shopify, making it an ideal choice for businesses that want to focus their efforts on SMS without the distraction of other marketing channels.

Key Features of Postscript for SMS Marketing

  1. SMS-First PlatformPostscript’s biggest strength is its SMS-first design. Unlike other platforms that offer email and SMS, Postscript is built around SMS marketing, ensuring that every feature is optimized for this channel. It’s the go-to platform for businesses that prioritize SMS marketing and want a specialized solution.
  2. Advanced SMS AutomationPostscript allows you to set up complex automated workflows for SMS campaigns. You can trigger messages based on customer behavior, such as making a purchase, browsing certain products, or abandoning a cart. These automated workflows are crucial in maintaining customer engagement and driving sales.
  3. Segmentation and PersonalizationMuch like Klaviyo, Postscript offers advanced segmentation based on customer data. You can target specific customer groups based on attributes like purchase history, location, or whether they’re a first-time buyer. Postscript also allows for a high degree of personalization, letting you include dynamic content in your SMS messages, such as personalized product recommendations.
  4. Integration with ShopifyPostscript integrates seamlessly with Shopify, making it incredibly easy to set up and manage SMS campaigns. It syncs with your Shopify store in real time, allowing you to pull customer data, track orders, and send personalized messages based on their activity on your website.
  5. Opt-In and Opt-Out FeaturesPostscript provides robust features for managing SMS opt-ins and opt-outs. It’s crucial for SMS marketers to follow compliance regulations such as TCPA (Telephone Consumer Protection Act) in the U.S., and Postscript ensures that you’re able to stay compliant with automated opt-out features and easy subscription management.
  6. Analytics and ReportingPostscript provides detailed analytics for your SMS campaigns, including metrics like delivery rates, click-through rates, and conversion rates. These insights allow you to understand your campaign's performance and make data-driven decisions.

Pricing: Postscript’s pricing is based on the number of SMS messages sent, with pricing tiers designed to accommodate businesses of various sizes. There's no free plan, but Postscript offers a 14-day free trial for new users.

Link: For more details, visit Postscript’s homepage here.

Klaviyo vs Postscript: Key Differences

Here’s a side-by-side comparison of Klaviyo and Postscript, highlighting their core differences:

FeatureKlaviyoPostscriptFocusAll-in-one marketing automation (email + SMS)SMS marketing specialistIntegration with E-CommerceIntegrates with Shopify, WooCommerce, BigCommerce, etc.Seamless integration with ShopifyAutomationAdvanced, supports both email and SMS automationSMS-focused automationSegmentationAdvanced segmentation based on customer behaviorAdvanced segmentation with SMS-specific triggersPricingFree plan available, SMS priced based on message volumeNo free plan, pricing based on message volumeAnalyticsIn-depth reporting for both email and SMSFocused on SMS analytics, including performance trackingAdditional ChannelsEmail, SMS, and other channelsSMS only

Which Platform is Right for You?

The choice between Klaviyo and Postscript depends on your business needs and how much you want to focus on SMS marketing.

  • Choose Klaviyo if:
    • You need an all-in-one platform for both email and SMS marketing.
    • You want the ability to automate and segment across multiple channels.
    • You are already using Klaviyo for email and want to add SMS as part of your marketing stack.
    • You need advanced analytics and reporting to measure the success of both your email and SMS campaigns.
  • Choose Postscript if:
    • You want a platform that is exclusively focused on SMS marketing and don't need the added complexity of email marketing.
    • You need a platform with deep Shopify integration and a strong focus on SMS-specific features.
    • Your business relies heavily on SMS as your primary marketing channel.
    • You want a platform with advanced opt-in and opt-out features for SMS compliance.

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Conclusion

Both Klaviyo and Postscript offer powerful SMS marketing capabilities, but the choice between them depends on your business goals. Klaviyo is a comprehensive marketing platform that works well for businesses looking for email and SMS marketing in one solution, while Postscript is the ideal choice for businesses that want a specialized platform for SMS marketing, especially for those using Shopify.

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